VisualSVN the requested operation cannot be performed on a file with a user-mapped section open

When trying to commit changes using VisualSVN I received the following error:

Can’t open file ##################### The requested operation cannot be performed on a file with a user-mapped section open.

"It turned out it was my Anti Virus software causing the problem (I'm using AVG). To fix I had to open the AVG control panel, go to Tools > Advanced Settings, expand Resident Shield > Directory Excludes and add the directory where my repositories are stored"

http://blogs.planetcloud.co.uk/mygreatdiscovery/post/VisualSVN-the-requested-operation-cannot-be-performed-on-a-file-with-a-user-mapped-section-open.aspx